Singapore Airlines Limited (SIA) (SGX: C6L) is the flag carrier of Singapore which operates from its hub at Changi Airport and has a strong presence in the Southeast Asia, East Asia, South Asia, and Oceania. Singapore Airlines was the launch customer of Airbus A380, currently the world's largest passenger aircraft. SIA operates many airline-related subsidiaries, such as aircraft handling and engineering. Its wholly owned subsidiary SilkAir manages regional flights to secondary cities with short-haul aircraft. Subsidiary Singapore Airlines Cargo operates SIA's freighter fleet, and manages the cargo-hold capacity in SIA's passenger aircraft. Subsidiary Scoot operates in the low-cost carrier sector, along with Tigerair. It ranks amongst the top 15 carriers worldwide in terms of revenue passenger kilometres, and 10th in the world for international passengers carried. On 15 December 2010, Singapore Airlines was announced by the International Air Transport Association as the second largest airline in the world by market capitalisation with a worth of 14 billion US dollars. Singapore Airlines utilises the Singapore Girl as its central figure in its corporate branding.